Just cause they aren’t taking away the cards you craft (much like the people who abused other things) you will be in the -xxxx in dust, you think you can’t be in the negative?
https://www.reddit.com/r/hearthstone/comments/d1mesn/anyone_know_why_trump_has_so_much_negative_gold/
the comments should explain if you wish to read it up.
but to sum it up
“Blizzard won’t take away what was already used, but they’ll find way to charge your ingame, and if you find way to keep abusing it to go even deeper in the negative, you’ll get ban”
If you don’t care about all your progress, card and money and time wasted, then sure you can follow that advice, but if you somewhat care about your account, it best to not abuse things like that.